Cytomegalovirus infection-enhanced cardiac allograft vasculopathy is abolished by DHPG prophylaxis in the rat

Circulation
K LemströmP Koskinen

Abstract

A wealth of clinical and experimental evidence exists for cytomegalovirus (CMV) infection as an accelerating factor in the development of cardiac allograft vasculopathy. In this study, the impact of 9-(1,3-dihydroxy-2-propoxymethyl) guanine (DHPG) on rat CMV infection-enhanced cardiac allograft vasculopathy is investigated. Heterotopic rat cardiac allografts were performed from the DA to the WF rat strain, and the recipients were immunosuppressed with cyclosporine A 2 mg.kg-1.d-1 s.c. for a period of 90 days until the end of experiment. Two groups of recipients were infected intraperitoneally with 10(5) plaque-forming units of rat CMV, whereas one group was left noninfected and used as controls. One group of rat CMV-infected rats was treated with DHPG with an initial dose of 20 mg/kg i.p. and a maintenance dose of 10 mg/kg i.p. twice a day from 1 day before transplantation to 30 days after transplantation. Compared with noninfected rats, rat CMV infection was associated with a significant increase in intimal thickening, from 0.68 +/- 0.10 to 1.30 +/- 0.12 score units (P < .01), and double the number of vessels affected (P < .01). DHPG treatment significantly reduced intimal thickening in rat CMV-infected rats, from 1.30 +/- 0.1...Continue Reading

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